The time range of my history file is from June 29, 2021 to August 1, 2021, and there are 793 files in total. I use the ./convert_mpas history.2021-0* command to generate the latlon.nc file. I extracted the v10 value of a certain latitude and longitude in the latlon.nc file, and there were only 792 lines of data, indicating that there were only 792 times. I don't know when the data was lost.